Boiler-furnace.



No. 776,143. PATENTED NOV. 29, 1904.

H. L. MEYER. BOILER FURNACE.

APPLIUATION FILED JULY 20, 1903.

NiTED STATES Patented November 29, 1904:.

PATENT OFFICE.

BOILER-FURNACE.-

SPECIFICATION forming part of Letters Patent No. 776,143, a e Nov mber 29, 1904.

Application filed July 20, 1903. Serial No. 166,221. (No model.)

To all whom, it may concern:

Be it known that I, HERMAN L. MEYER, a citizen of the United States of America, and a resident of St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Boiler- Furnaces, of which the following is a specification.

My invention relates to improvements in furnaces, its object being to create better combustion of fuel than heretofore, thereby reducing the amount consumed and the formation of smoke. One of the objectionable features of furnaces, in which the coal is coked before it is used, is that the front of the furnace is exposed to the successive actions of heat. Much heat is thus wasted and the linings of the front are burned away after being used a short time. With my invention the coal is effectively coked, and the mechanism for feeding the coal into the furnace is so constructed as to reduce the amount of heat that is wasted and eliminate the burning away of the linings.

My invention further consists of the elements, features of construction, and combination of parts hereinafter more particularly described and claimed.

In the accompanying drawings, forming part of this specification, Figure 1 is a longitudinal section of my invention. Fig. 2 is a detail front view of the same, shown partly in section; and Fig. 3 is a sectional view of the furnace, taken on the line X X of Fig. 1.

This invention is shown in the drawings applied to what is commonly known as a boiler-furnace, A representing the boiler, B the furnace, and O my improved meehanism, which is shown in connection with said furnace. This improved mechanism consists of the wall 2, which projects on the front of the furnace, as shown in Fig. 1. This wall has the ordinary fire-doors 3 and 4 and ashdoors 5 and 6. A front 7 is preferably provided on the wall 2, on which the doors above described may be hinged at8 in the ordinary manner. The fire-doorways 9 and 10 are lined with metal frames 11 and 12, which are preferably constructed with their upper surfaces 13 inclined down into the coking passage-way D, which is positioned between the fire-doorways. The inner edge 14 of the sides 1% taper down toward the front of the wall, as shown in Fig. 1, so that the coal which is fed into the furnace through the coking passage-Way will more readily spread and enter the fire-doorways, and thus be subjected to the action of the heat from the furnace. The coking passage-way between the fire-doorways is constructed of fire-brick, which is filled in between the door-frames to form a slanting surface E from the mouth 15 of the coking passage-way to the front of the [iregrate 16 in the furnace. An archway 17, of brick, is constructed above the coking passage-way and over the upper surfaces 13 of the door-frames, as shown in Fig. 2. The mouth of the coking passage-way is closed by means of the door 18, which is hinged at 19 to the boiler-front 20.

In operation the door 18 is opened and coal filled into the coking passage-way D above and between the door-frames. The heat in the furnace cokes the coal in front of the grate and over the tops of the door-frames. The door 18 may be adjusted so as to admit air into the furnace when desired. This air as it enters the furnace is heated and creates better combustion of the coal in the furnace. The coal is fed onto the grate after it is coked by means of a strap-hook or other device, whiclris inserted either by hand or machine through the doorways.

Having described my invention, what I claim as new,and desire to protect by Letters Patent, is-

1. In combination with a boiler and its furnace, having a grate, a projecting wall on the front of said furnace, a pair of fire-doorways in said wall, a coking passage-way above and extending down through said wall between said fire-doorways and terminating near the front of the furnace-grate, an arch above said coking passage-way, and means for closing said coking passage-Way.

2. In combination with a boiler and its furnace having a grate, a projecting wall in front of said furnace,a coking passage-way inclined down through said wall to the front of said grate, a lire-doorway through said wall adjoining said passage-way,a'nd means for closing said coking passage-way and fire-doorway.

3. In combination with a boiler and its furnace having a fire-grate, a wall in front of said furnace, a pair of fire-doorways in said wall,a coking passage-way slanting down into said furnace through said wall and positioned between said doorways, an arch above said coking passage-way, and a door at the mouth of the coking passage-way; said door and arch being so positioned with relation to the fire: doorways as to form an inclosure over said doorways for the purpose of coking the coal above and between the doorways, for the purposes specified.

4. In combination with a boiler and its furnace having a fire-grate, a wall at the front above said coking passage-way and over the tops of said door-frames, and a door at the mouth of said coking passage-way and above said door-frames, for the purposes specified.

5. In combination witha boiler and its furnace having a fire-grate, a wall at the front HERMAN L. MEYER.

WVitnesses:

E. M. BOESEL, F. G. BRADBURY. 

